Wavelength
A mountain pass would not be the correct term, while a valley can be found between two mountains there is another geological formation that can take place. A saddle is a low point between two peaks in a ridge (a ridge being an area of land with multiple peaks), if the peaks are large enough to be considered mountains then the answer would be a saddle instead of a valley.
You can look at how sharp the peaks are, and you can tell by looking at how much vegetation there is.
rocky, steep and it has peaks
nanda devi
A low point on a ridge between two mountain peaks is called a saddle. A low level separating two mountains is called a valley.
It is the distance between two peaks or two troughs in a wave.
The distance between two peaks or two troughs of a wave
Wavelength is the distance between two adjacent wave peaks (or troughs).
The distance between two adjacent wave peaks (or troughs).
The wavelength of a transverse wave is the distance between adjacent crests or troughs (peaks or valleys).
the distance between two consecutive compressions or rarefactions of a light wave is called its wavelength.
On a wave pattern, the measurement of distance between two corresponding wave peaks, troughs or crests will give the wavelength.
Wavelength is a measure of depth/distance - namely the distance between peaks or troughs in a wave. For light this is referring to peaks/troughs of signal strength. Because the front velocity of a photon of light is always constant (ALWAYS, WITH RESPECT TO ALL FRAMES OF REFERENCE IN THE UNIVERSE, NO EXCEPTIONS), the wavelength of a photon is also a direct measure of it's energy.
Peakas in Peaks and troughs
The wavelength is defined as the distance between the two nearest parts of the wave that are in phase - two parts of the wave that are at the same point in their oscillation. For example, the wavelength can be measured between two peaks, or two troughs.
The length between wave peaks and troughs will get shorter
Light is measured by its wavelength (in Hertz). Wavelength approaches the separation between two progressive wave peaks or troughs. Frequency is the number of peaks or troughs per unit of time.